EP1083115B1 - Capot automobile renforcé et léger - Google Patents

Capot automobile renforcé et léger Download PDF

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Publication number
EP1083115B1
EP1083115B1 EP00402364A EP00402364A EP1083115B1 EP 1083115 B1 EP1083115 B1 EP 1083115B1 EP 00402364 A EP00402364 A EP 00402364A EP 00402364 A EP00402364 A EP 00402364A EP 1083115 B1 EP1083115 B1 EP 1083115B1
Authority
EP
European Patent Office
Prior art keywords
skin
reinforcement
bonnet
edges
cover
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP00402364A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1083115A1 (fr
Inventor
Jean-Marc Devin
Francis Schmit
Olivier Brun
Pascal Deprez
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
USINOR SA
Original Assignee
USINOR SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by USINOR SA filed Critical USINOR SA
Publication of EP1083115A1 publication Critical patent/EP1083115A1/fr
Application granted granted Critical
Publication of EP1083115B1 publication Critical patent/EP1083115B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/08—Front or rear portions
    • B62D25/10—Bonnets or lids, e.g. for trucks, tractors, busses, work vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D29/00—Superstructures, understructures, or sub-units thereof, characterised by the material thereof
    • B62D29/001—Superstructures, understructures, or sub-units thereof, characterised by the material thereof characterised by combining metal and synthetic material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/08—Front or rear portions
    • B62D25/10—Bonnets or lids, e.g. for trucks, tractors, busses, work vehicles
    • B62D25/105—Bonnets or lids, e.g. for trucks, tractors, busses, work vehicles for motor cars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D29/00—Superstructures, understructures, or sub-units thereof, characterised by the material thereof
    • B62D29/001—Superstructures, understructures, or sub-units thereof, characterised by the material thereof characterised by combining metal and synthetic material
    • B62D29/005—Superstructures, understructures, or sub-units thereof, characterised by the material thereof characterised by combining metal and synthetic material preformed metal and synthetic material elements being joined together, e.g. by adhesives

Definitions

  • the invention relates to covers which provide cover for a compartment at the front or rear of a motor vehicle; these hoods generally provide cover for the "engine” compartment.
  • a cover according to the preamble of claim 1 is known from the state of the art.
  • Motor vehicle hoods generally include a skin external and internal means of strengthening this skin (US -A-2 709108).
  • motor vehicle hoods include in a manner classic accessories like hinges, stops and means closing.
  • the skins and Hood reinforcements are generally made of sheet steel.
  • Patent FR 2 726 802 SOLLAC
  • SOLLAC laminated sheet covers
  • a cover with sandwich structure smooth upper facing, lower facing ribbed, epoxy glue between the facings and in the ribs; because of ribs of the facing, the thickness of the core is not uniform; thanks to ribs of the sheet, it is not necessary to provide other means of reinforcement of the hood.
  • the object of the invention is to provide a cover which is both light, resistant and economic.
  • cover according to the invention and in particular its skin. external and its shaping, its internal means of reinforcement, and the assembly of this skin and these reinforcing means.
  • a laminated composite sheet is used for the skin. comprising two external sheet steel facings and a thick core uniform in polymer material.
  • polymeric material materials for example can be used.
  • the porosity of the polymer material is fairly low, in particular less than 25% by volume; conversely, as indicated in document FR 2 760 983 (SOLLAC), a minimum of porosity may be necessary to facilitate forming operations (for example: stamping, bending, falling edges) and assembly (for example, crimping) of the laminated composite sheet that are needed to make a hood.
  • EP 019 835 (DOW), EP 115 103 (SUMITOMO), EP 478 039 (HOOGOVENS).
  • This laminated composite sheet has a very good ratio (flexural rigidity) / (weight), in particular when the thickness of the core is high and when that of the steel facings is low; Table I illustrates this advantage.
  • Flexural strength of the laminate material Steel thickness Core thickness Mass (kg / m 2 )
  • this table I it can be seen that the laminate having a thick core (1.5 mm) weighs almost the same weight as the steel plate (0.7 mm) but resists approximately 12 times better in bending.
  • Laminates with a core thickness greater than or equal to 0.8 mm are therefore particularly suitable for implementing the invention.
  • the skin of the hood is shaped by conventional means, especially by stamping; the following documents describe the implementation form of laminated materials: EP 479 369 (HOOGOVENS) and EP 598 428 (HOOGOVENS).
  • the thickness of the core of the laminated composite sheet may vary locally in the deformation zones resulting from the setting operations shape or assembly, as described in document FR 2 760 983; despite these local variations in thickness, it is considered that the skin of the hood according to the invention comprises a core of uniform thickness.
  • the skin may have fallen edges which contribute to the stiffness in bending and twisting of the cover, especially when the height of these edges fallen is more than 15 mm; for reasons of style and appearance, a classic way, the front and back edges of the skin are usually crimped.
  • the skin can also be crimped all around.
  • the thickness of the steel sheet that is used to constitute these means of reinforcement is generally between 0.5 and 0.9 mm; in practice, 0.5 mm is a reasonable lower limit, based on the criteria embossability, mechanical strength, assembly by points of welding with possible fixing reinforcements, generally in sheet metal plus thick; the steel grade used for these reinforcing means is a classic deep-drawing grade, with no elastic limit particularly high, because the cover is not a structural part.
  • These reinforcing means are generally carried out by stamping.
  • Example 3 illustrates a very classic “frame” type form while examples 1 and 2 illustrate new forms.
  • the reinforcement means and the skin are then assembled by conventional means, such as bonding and crimping, or riveting.
  • the purpose of this example is to illustrate a first embodiment of the invention in the case of a cover whose dimensions are inscribed in a rectangle 1375 mm x 1360 mm (surface 1.5 m 2. )
  • the cover comprises a sheet metal skin 1 laminate composite and a V-shaped reinforcement 2 as a means of enhancement ; this cover has no other reinforcement, even along the skin contours.
  • the V-shaped frame 2 extends from one edge to the other opposite of the skin to strengthen, in the sense that the front of the skin corresponds to the base of the V and that each end of the back edge of the skin corresponds to one end of the V.
  • This V-shape of the frame 2 is particularly advantageous for the fixing the hinges and the hood closing means: in fact, it fixes a hinge at each end of the V along the same skin edge and we fixes the closing means at the base of the V at the center of the edge of opposite skin
  • Frame 2 is made of sheet steel - 0.8 mm thick - stamped so that its general shape seen in section is a "U" with a height maximum of about 25 mm and an average width of 30 mm.
  • the laminated composite sheet used for the skin 1 comprises two sheet steel facing - each 0.25 mm thick - and one core 1.5 mm uniform thickness based on polypropylene.
  • edges of the skin have fallen or crimped; in case of fallen edges, the edge height is greater than 15 mm, of the order of 23 mm.
  • Excluding accessories such as hinges, locking means, mass total of this hood is 9.6 kg distributed between 7.9 kg for the skin and only 1.8 kg for the means of strengthening the skin; the weight of the means of reinforcement represents less than 20% of the weight of the cover excluding accessories; compared to a conventional hood with comparable mechanical performance (sheet steel skin - lining-shaped frame), the weight gain is greater than 35%; as the skin facings and the frame are made of steel, the hood remains economical.
  • the purpose of this example is to illustrate a second embodiment of the invention for a cover whose dimensions are 670 mm x 1520 mm.
  • the cover comprises a skin 1 'in sheet metal laminate composite and two transverse reinforcements 3, 3 'applied along two opposite edges of the skin corresponding to the largest dimension of the hood; this cover has no other frame.
  • the transverse reinforcements 3, 3 ' are made of sheet steel - thickness 0.6 mm - pressed to a depth of 20 mm maximum.
  • the laminated composite sheet used for the skin 1 comprises two sheet steel facing - each 0.25 mm thick - and one core uniform thickness 1 mm based on polypropylene.
  • edges of the skin have fallen or crimped; in case of fallen edges, the edge height is greater than 15 mm, of the order of 18 mm.
  • the total mass of this cover is 7.96 kg distributed between 4.87 kg for the skin and only 3.09 kg for skin strengthening means; the weight of the reinforcing means represents less than 40% of the weight of the cover excluding accessories; compared to a classic performance hood comparable mechanical (sheet steel skin - shaped frame lining), the weight gain is 30%; like skin facings and the frame is made of steel, the cover remains economical.
  • the purpose of this example is to illustrate a third embodiment more classic of the invention in the case of a hood whose dimensions are 670 mm x 1520 mm.
  • the cover comprises a 1 "sheet metal skin laminate composite and a frame-shaped reinforcement 8 applied around the perimeter skin; this cover has no other frame.
  • This frame is made of sheet steel 0.6 mm thick stamped on a maximum depth of 25 mm.
  • the laminated composite sheet used for the 1 "skin has two sheet steel facing - each 0.25 mm thick - and one core of uniform thickness 1 mm based on polyester.
  • edges of the skin are crimped except the side edges which have fallen, the height of the fallen edges is greater than 15 mm, of the order of 18 mm.
  • the means for closing the cover as well as the any stops and the hinge reinforcements of the hood are provided.
  • the total mass of this cover is 8.1 kg distributed between 4.87 kg for the skin and only 3.23 kg for the strengthening means the skin ; the weight of the reinforcing means represents less than 40% of the cover weight excluding accessories; compared to a conventional hood of Comparable mechanical performance (steel sheet skin - steel frame form of lining), the weight gain is 28%; like the facings of the skin and frame are made of steel, the cover remains economical.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Superstructure Of Vehicle (AREA)
  • Laminated Bodies (AREA)
  • Body Structure For Vehicles (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
EP00402364A 1999-09-09 2000-08-25 Capot automobile renforcé et léger Expired - Lifetime EP1083115B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9911260A FR2798356B1 (fr) 1999-09-09 1999-09-09 Capot automobile renforce et leger
FR9911260 1999-09-09

Publications (2)

Publication Number Publication Date
EP1083115A1 EP1083115A1 (fr) 2001-03-14
EP1083115B1 true EP1083115B1 (fr) 2003-05-28

Family

ID=9549660

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00402364A Expired - Lifetime EP1083115B1 (fr) 1999-09-09 2000-08-25 Capot automobile renforcé et léger

Country Status (11)

Country Link
US (1) US6398286B1 (es)
EP (1) EP1083115B1 (es)
JP (1) JP2001106119A (es)
KR (1) KR20010050385A (es)
AT (1) ATE241497T1 (es)
BR (1) BR0004036A (es)
CA (1) CA2316689A1 (es)
DE (1) DE60002963T2 (es)
ES (1) ES2199750T3 (es)
FR (1) FR2798356B1 (es)
PT (1) PT1083115E (es)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040006783A (ko) * 2002-07-15 2004-01-24 기아자동차주식회사 차량의 후드판넬 구조
DE10258299B4 (de) 2002-12-13 2019-08-08 Volkswagen Ag Karosseriefronthaube für ein Kraftfahrzeug
US7467680B2 (en) * 2003-03-18 2008-12-23 Ford Global Technologies, Llc Motor vehicle hood with pedestrian protection
US7222687B2 (en) * 2003-06-06 2007-05-29 Deere & Company Hood for off road work vehicle
EP1829756B1 (en) * 2003-07-01 2012-12-12 Toyota Jidosha Kabushiki Kaisha Vehicular hood structure and vehicle body front portion structure
ATE411202T1 (de) * 2003-10-31 2008-10-15 Dow Global Technologies Inc Schalldämpfungssystem
DE10354371A1 (de) * 2003-11-20 2005-06-23 Hymer-Leichtmetallbau Gmbh & Co. Kg Fahrzeugklappe für insbesondere einen Motor- oder Gepäckraum bei einem Omnibus
US20050236736A1 (en) * 2004-04-23 2005-10-27 Formella Stephen C Composite product and forming system
US20050255311A1 (en) * 2004-04-23 2005-11-17 Formella Stephen C Hybrid composite product and system
DE602005022327D1 (de) * 2004-08-31 2010-08-26 Toray Industries Motorhaube für kraftfahrzeug
DE102005018976A1 (de) * 2005-04-23 2006-10-26 Bayerische Motoren Werke Ag Kraftfahrzeugkarosserie
US7498543B2 (en) * 2006-03-22 2009-03-03 Gm Global Technology Operations, Inc. Method for joining or repairing metal surface parts
US20080081149A1 (en) * 2006-09-28 2008-04-03 Gm Global Technology Operations, Inc. Gas diffusing laminated steel sandwich panels
JP4575939B2 (ja) 2007-07-27 2010-11-04 本田技研工業株式会社 トランクリッド骨格構造
EP2205479B1 (en) * 2007-08-08 2016-05-25 Mahindra & Mahindra Ltd. Bonnet with integrated air duct
DE102009059984A1 (de) * 2009-12-22 2011-06-30 Volkswagen AG, 38440 Frontklappe für ein Kraftfahrzeug
CN102910211B (zh) * 2012-10-30 2015-09-23 奇瑞汽车股份有限公司 汽车行李箱盖内板
JP6233327B2 (ja) * 2015-02-05 2017-11-22 トヨタ自動車株式会社 車両用パネル構造及び車両用パネル構造の製造方法
RU168686U1 (ru) * 2016-07-22 2017-02-15 Общество с ограниченной ответственностью "Нанотехнологический центр композитов" (ООО "НЦК") Композитный кожух моторного отсека наземного транспортного средства
WO2020145293A1 (ja) * 2019-01-08 2020-07-16 日本製鉄株式会社 外装パネルおよび外装パネルを備える自動車
CN112455552A (zh) * 2020-11-27 2021-03-09 维泰汽车科技(常州)有限公司 一种汽车舱盖总成结构

Citations (1)

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Publication number Priority date Publication date Assignee Title
US2709108A (en) * 1951-07-11 1955-05-24 Budd Co Trunk lid or the like for automobile

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AU528449B2 (en) 1979-05-21 1983-04-28 Dow Chemical Company, The Formable metal-plastic-metal laminates
EP0115103B1 (en) 1983-01-24 1987-11-25 Sumitomo Metal Industries, Ltd. Metal-resin-metal sandwich laminates suitable for use in working
US4865789A (en) * 1983-11-14 1989-09-12 Akzo Nv Method for making porous structures
FR2621677B1 (fr) * 1987-10-13 1990-06-22 Heuliez Henri France Design Structure rigide destinee a la realisation de panneaux ou d'elements tridimensionnels
JPH081180Y2 (ja) * 1989-07-26 1996-01-17 マツダ株式会社 車両のボンネット構造
NL9002022A (nl) 1990-09-14 1992-04-01 Hoogovens Groep Bv Werkwijze en inrichting voor het vervaardigen van een metaal-thermoplast-metaal laminaat, alsmede het aldus verkregen laminaat.
NL9002134A (nl) 1990-10-01 1992-05-06 Hoogovens Groep Bv Werkwijze voor het uitvoeren van een buigbewerking op een laminaat.
GB2268130B (en) 1992-06-29 1995-11-22 Ford Motor Co Hood tops for motor vehicles
NL9201968A (nl) 1992-11-11 1994-06-01 Hoogovens Hylite B V Aluminium-polypropyleen-aluminium laminaat.
DE9310986U1 (de) 1993-07-22 1993-09-02 Adam Opel AG, 65428 Rüsselsheim Großflächiges Karosserieelement eines Kraftfahrzeugs, insbesondere Motor- oder Kofferraumhaube
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JP3293355B2 (ja) * 1994-09-06 2002-06-17 スズキ株式会社 自動車のフード構造
FR2726802B1 (fr) 1994-11-16 1996-12-13 Lorraine Laminage Element de robe de carrosserie d'un vehicule automobile
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US2709108A (en) * 1951-07-11 1955-05-24 Budd Co Trunk lid or the like for automobile

Also Published As

Publication number Publication date
KR20010050385A (ko) 2001-06-15
FR2798356A1 (fr) 2001-03-16
US6398286B1 (en) 2002-06-04
CA2316689A1 (fr) 2001-03-09
BR0004036A (pt) 2001-06-19
EP1083115A1 (fr) 2001-03-14
DE60002963T2 (de) 2004-01-22
ES2199750T3 (es) 2004-03-01
DE60002963D1 (de) 2003-07-03
JP2001106119A (ja) 2001-04-17
FR2798356B1 (fr) 2001-10-26
ATE241497T1 (de) 2003-06-15
PT1083115E (pt) 2003-09-30

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